Method and Apparatus for Supporting Allocation of Transmission Resource for Sidelink Relay Discovery Message in Wireless Communication System

1. A method, performed by a relay user equipment (UE) in a wireless communication system, the method comprising: obtaining configuration information including sidelink configuration information, wherein the sidelink configuration information includes a sidelink resource pool; identifying whether the sidelink configuration information includes a dedicated resource pool for a sidelink discovery message, in case that the sidelink configuration information includes the dedicated resource pool for the sidelink discovery message, selecting the dedicated resource pool for the sidelink discovery message as a resource pool for the sidelink discovery message; in case that the sidelink configuration information does not include the dedicated resource pool for the sidelink discovery message, selecting the sidelink resource pool as the resource pool for the sidelink discovery message; and transmitting, to a remote UE, the sidelink discovery message based on the resource pool for the sidelink discovery message.

2. The method of claim 1, further comprising: receiving, from the remote UE, sidelink discovery based on the resource pool for the sidelink discovery message.

3. The method of claim 2, wherein receiving the sidelink discovery comprises: receiving, from a base station (BS), a system information block; selecting the dedicated resource pool for the sidelink discovery message as the resource pool for the sidelink discovery message based on the system information block; and receiving, from the remote UE, the sidelink discovery based on the resource pool for the sidelink discovery message.

4. The method of claim 1, further comprising: transmitting, to a base station (BS), a message requesting the configuration information.

5. The method of claim 3, further comprising: in case that a frequency configured to transmit the sidelink discovery message is a camped frequency and the system information block does not include information associated with the resource pool, performing a RRC connection establishment procedure.

6. The method of claim 1, wherein selecting the dedicated resource pool for the sidelink discovery message as the resource pool for the sidelink discovery message comprises: selecting the dedicated resource pool for the sidelink discovery message as the resource pool for the sidelink discovery message based on scheduling information received from a base station (BS).

7. The method of claim 1, wherein selecting the dedicated resource pool for the sidelink discovery message as the resource pool for the sidelink discovery message comprises: selecting the dedicated resource pool for the sidelink discovery message as the resource pool for the sidelink discovery message based on selecting of the relay UE.

8. A relay user equipment (UE) in a wireless communication system, the relay UE comprising: a transceiver; memory; and a processor operably coupled with the transceiver and the memory, the processor configured to: obtain configuration information including sidelink configuration information, wherein the sidelink configuration information includes a sidelink resource pool, identify whether the sidelink configuration information includes a dedicated resource pool for a sidelink discovery message, in case that the sidelink configuration information includes the dedicated resource pool for the sidelink discovery message, select the dedicated resource pool for the sidelink discovery message as a resource pool for the sidelink discovery message; in case that the sidelink configuration information does not include the dedicated resource pool for the sidelink discovery message, select the sidelink resource pool as the resource pool for the sidelink discovery message; and transmit, to a remote UE, the sidelink discovery message based on the resource pool for the sidelink discovery message.

9. The relay UE of claim 8, wherein the processor is further configured to: receive, from the remote UE, sidelink discovery based on the resource pool for the sidelink discovery message.

10. The relay UE of claim 9, wherein the processor is further configured to: receive, from a base station (BS), a system information block; select the dedicated resource pool for the sidelink discovery message as the resource pool for the sidelink discovery message based on the system information block; and receive, from the remote UE, the sidelink discovery based on the resource pool for the sidelink discovery message.

11. The relay UE of claim 8, wherein the processor is further configured to: transmit, to a base station (BS), a message requesting the configuration information.

12. The relay UE of claim 10, wherein the processor is further configured to: in case that a frequency configured to transmit a sidelink relay discovery message is a camped frequency and the system information block does not include information associated with the resource pool, perform an RRC connection establishment procedure.

13. The relay UE of claim 8, wherein the processor is further configured to: select the dedicated resource pool as the resource pool based on scheduling information received from a base station (BS).

14. The relay UE of claim 8, wherein the processor is further configured to: select the dedicated resource pool for the sidelink discovery message as the resource pool for the sidelink discovery message based on scheduling information received from a base station (BS).

15. The method of claim 5, further comprising: in case that the relay UE is configured to transmit the sidelink discovery message, performing a RRC connection establishment procedure for the configuration information including the sidelink configuration information.

16. The relay UE of claim 12, further comprising: in case that the relay UE is configured to transmit the sidelink discovery message, perform a RRC connection establishment procedure for the configuration information including the sidelink configuration information.